Method and system for wireless energy harvesting and power management using piezoelectric components

Abstract

The present invention relates to a radio frequency energy harvester module and an optimization circuit for efficient power conversion and storage. The harvester module receives an AC input voltage from a wireless power source, rectifies it into a DC voltage, and uses a piezoelectric transformer to convert this voltage into a transformed AC signal, which is subsequently rectified to generate a stable DC output. The system includes a DC to AC converter or an oscillator to generate excitation or oscillation signals, matched to the resonance frequency of the piezoelectric transformer. The invention also introduces an optimization circuit for managing power storage and delivery to external devices, ensuring adaptive and efficient energy usage. The method includes steps for converting wireless power into usable DC output using rectification, piezoelectric transformation, and feedback-based optimization.

What is claimed is: 
     
         1 . A optimization circuit for a power reservoir comprising:
 an oscillator comprising structure elements configured to generate an oscillation signal from a received biasing signal;   a piezoelectric transformer comprising structure elements configured to generate a transformed AC signal from the oscillation signal generated by the oscillator;   an energy reservoir module comprising at least one of: a capacitor, a battery cell or another component able to store and output DC reservoir voltage;   an AC to DC converter comprising structure elements configured to generate a DC storage voltage from the transformed AC signal generated by the piezoelectric transformer, and output the DC storage voltage to the energy reservoir module;   a power management module comprising structure elements configured to receive the DC reservoir voltage from the energy reservoir module and output both the biasing signal and a DC output voltage; wherein the DC output voltage powers an external circuit;   wherein the piezoelectric transformer has an input electrically coupled to the oscillator and an output electrically coupled to the AC to DC converter in a configuration that causes the structure elements of the piezoelectric transformer to generate an amplified AC signal or an inverted AC signal, or amplified and inverted AC signal from the oscillation signal generated by the oscillator based on the requirements of the external circuit and the energy reservoir module; and, wherein the structure elements of the oscillator is configured to generate the oscillation signal with a frequency matching a resonance frequency of the piezoelectric transformer.